beater Master | Next Rank: 500 Posts View User Profile Posts: 301 Joined: Tue Apr 22, 2008 6:07 am Thanked: 2 times number prop by beater » Fri Sep 05, 2008 11:47 am If k and n are integers, is n divisible by 7? 1. n - 3 = 2k 2. 2k - 4 is divisible by 7 Top Quote
